Window ventilator



July 10, 1928.

-- I M. F. CLAY I WINDOW VENTILATOR Filed May 12. 1924 Patented July 10,

' mn'nsnnnnr. CLAY; or? onn roiv, onto.)

'- wnvnow VENTILATOR.

' Application filed May 12,

This; invention relates toventilatorscreens for windows and other structures, where it is desirable to provide ventilation, and the object of the improvement is'to provide a ventilator arranged to permit free passage of air but excluding rain, snow, dust and dirt as well as'preventing a strong draught of air into the room.

Further objects of the invention are to provide a ventilator including a metal frame provided with louvers and having a removable screen provided with a detachable screen fabric covering, whereby the screen fabric maybe easily and readily removed for the purpose of washing or renewing the same. The above and other objects may be attained by constructing the ventilator in the manner. illustrated in .the accompanying drawing,'in which- Figure l is an inside elevation of a ventilator embodying the invention; 7

Fig. 2, a section on the line 22,Fig. 1; Fig. 3, an enlarged fragmentary section of the screen frame, showing the manner in which the screen fabric is detachably secured to the frame; I I

Fig. '4, a detail plan elevation of the screen frame; and

For the purpose of preventing rain or snow from being blown intothe ends of the louvers, an angle strip 3 is spot welded or otherwise fastened tothe plate at eachend of the louvers. It willfalso be seen that the construction of the louvers prevents even a strong wind from can sing any considerable draught through the same.

tions 4 which receive the end slides 5,"each of which is preferablyprovided withthe bent over upper and lower edges 6, slidably mounted in the channels 4 of the plate.

' as indicated at 7, exposing the greater por- The inner end portion of each of the end slides is cut away in any suitableform, such Fig.5, anedge elevation of thesaniea Similar numerals indicate corresponding The ventilator comprises a metal plate 1,.

of filtering material.

i954:saam.;12,ess;f i i tion of the order permit;

air to pass freely through the ventilating same. e

For the purpose of preventing dirt and dust from passing through the ventilator into the room, a filter is provided which comprises a rectangular metal frame 8 mounted within the channels 4 and arranged to be slidably removed therefrom and covered with a filter cloth 9 which may be cheesecloth or similar material,

This frame is provided uponits inner side with the angular flange 10'over which the fabric 9is stretched, the edge portions of 6 J the fabric being folded back over the outer edges of the frame and detachably secured thereto by means of the channel clamping strips 11, the wider edge 12 thereof engaging the fabric between the flange 10 and the edge of the frame, tilting the clamping strip in the manner best shown in Fig. 3, causing v the edge of the narrow side 13 of the strip to bind the fabric tightly against the adja'cent side of the frame.

.By-tapering the ends of the flanges 10 downward from the intersection of the flanges to the edge of the frame, as shown at '14, the fabric will v be further stretched at the corners, causing the clamping strips 11 to more tightly bind the fabric around the edges-of the frame. r

'From the above, it will be obvious that a window ventilator is provided which is quickly adjustable to fit windows of various widths and which, while permitting suflicient ventilating air to pass therethrough, will prevent the passage of rain, snow, dust and I dirt and strong gusts of wind from-passing through the ventilatorinto the room.

It will, also be obvious that the ventilator is provided with a removable screen pro-' vided with a detachable fabric screening material which may be easily and readily removed when it is necessary to wash or renew the same.

I claim I 7 1. A ventilator comprising a metalplate having louvers formed therein and providedwith channel guides at its upper and lower edges, angle strips at each end of thelouvers, a fabric filter mounted in the'chanframe provided with adetachable covering 2. A ventilator comprising a metal plate and having channel guides at its upper' and vnel guides, and comprising a removable in the guides and comprising a metal frame havingan angle flange around its inner edge,

a fabric filter coveringthe frame andchannel attaching strips for clamping the filter to the edge portions of the frame.

3. A ventilator comprising a metal plate and having channel guides at its upper and lower edges and a detachable screen located 10in the guides and comprising a metal frame having'an angle flange around its inner end portions of the angle flange being ta- 15 pered toward the edge of the frame.

In testimony that I claim the above, I have hereunto subscribed my name.

MARSHALL F. CLAY. 

